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Article
Determination of Free Fatty Acids in Tibet Folk Medicine Potentilla anserina L. Using a New Labeling Reagent by LC with Fluorescence Detection and Identification with Online Atmospheric Chemical Ionization-MS Identification
A sensitive method for the determination of free fatty acids using 1,2-benzo-carbazole-9-ethyl-p-toluenesulfonate (BCETS) as tagging reagent with fluorescence detection has been developed. BCETS could easily and ...
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Article
Comprehensive Comparisons between 1-Phenyl-3-methyl-5-pyrazolones, 1-(4-Methoxyphenyl)-3-methyl-5-pyrazolones and 1-(2-Naphthyl)-3-methyl-5-pyrazolones as Labeling Reagents Used in LC-DAD-ESI-MS-MS Analysis of Neutral Aldoses and Uronic Acids
Comprehensive comparisons between three 1-aryl-3-methyl-5-pyrazolone (AMP) labeling reagents were carried out for the analysis of reductive monosaccharides using reversed phase high performance liquid chromato...
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Article
Determination of Fatty Acids (C1 – C10) from Bryophytes and Pteridophytes
A simple and mild method for the determination of fatty acids (C1 – C10) based on a condensation reaction using 7-aminonaphthalene-1,3-disulfonic acid (ANDSA) as labeling reagent with capillary zone electrophores...
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Article
Determination of Free Fatty Acids from Soil by LC–MS with Fluorescence Detection and Atmospheric Pressure Chemical Ionization Identification
A simple and highly sensitive method for the determination of fatty acids using liquid chromatography with fluorescence detection is described. Fatty acids were derivatized by a new novel pre-column derivatiza...
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Article
LC-Fluorescence Detection Analysis of Amino Acids from Stellera chamaejasme L. Using 2-[2-(Dibenzocarbazole)-ethoxy] Ethyl Chloroformate as Labeling Reagent
A pre-column derivatization method for the sensitive determination of amino acids using the tagging reagent 2-[2-(dibenzocarbazole)-ethoxy] ethyl chloroformate (DBCEC) followed by liquid chromatography with fl...
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Article
LC Determination of Trace Biogenic Amines in Foods Samples with Fluorescence Detection and MS Identification
A pre-column derivatization method for the simple, sensitive determination of biogenic amines using 10-ethyl-acridine-3-sulfonyl chloride (EASC) as labeling reagent with fluorescence detection and mass spectro...
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Article
Compositional and Antioxidant Activity Analysis of Zanthoxylum bungeanum Seed Oil Obtained by Supercritical CO2 Fluid Extraction
Supercritical CO2 fluid extraction (SFE-CO2) of Zanthoxylum bungeanum (Z. bungeanum) seed oil was investigated. To optimize the SFE process, three-level Box-Behnken factorial design and response surface methodolo...
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Article
Determination of trace amino acids in human serum by a selective and sensitive pre-column derivatization method using HPLC-FLD-MS/MS and derivatization optimization by response surface methodology
Analysis of trace amino acids (AA) in physiological fluids has received more attention, because the analysis of these compounds could provide fundamental and important information for medical, biological, and ...
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Article
Composition Analysis of Free Fatty Acids from Swertia Species by a Novel Pre-column Fluorescence Labelling Method Using HPLC-FLD
Free fatty acids (FFA) are basic and indispensable components of medicinal plants. Many researches indicate that the efficacy of medicinal plant requires the presence of FFA. In the present study, ultrasonic-a...
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Article
A Novel Labeling Reagent of 2-(12-Benzo[b]acridin-5-(12H)-yl)-acetohydrazide for Determination of Saturated and Unsaturated Fatty Acids in Traditional Chinese Herbs by HPLC-APCI-MS
A new fluorescence labeling reagent 2-(12-benzo[b]acridin-5(12H)-yl)-acetohydrazide (BAAH) has been designed for fatty acids labeling. Eleven fatty acids containing seven saturated and four unsaturated fatty acid...
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Article
Fluorescence Probe of 10-Phenyl-acridone-2-sulfonyl Chloride and Its Application for Determination of Free Aliphatic Amines in Environmental Samples by HPLC with Fluorescence Detection and APCI-MS
A simple and sensitive method for the determination of free aliphatic amines using 10-phenyl-acridone-2-sulfonyl chloride (PASC) as a labeling reagent by high-performance liquid chromatography with fluorescenc...
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Article
Trigonella foenum-graecum L. Seed Oil Obtained by Supercritical CO2 Extraction
Supercritical CO2 extraction (SC-CO2) of fenugreek (Trigonella foenum-graecum L.) seed oil and its chemical composition and antioxidant activity were investigated. A central composite design combined with respons...
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Article
Determination of Bisphenol A and Alkylphenols in Soft Drinks by High-Performance Liquid Chromatography with Fluorescence Detection
A highly sensitive and selective method was developed for the purification and determination of bisphenol A and alkylphenols in soft drinks by using 2-(11H-benzo[a]carbazol-11-yl) ethyl chloroformate (BCEC-Cl)...
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Article
Electrochemical behavior and voltammetric determination of L-tryptophan and L-tyrosine using a glassy carbon electrode modified with single-walled carbon nanohorns
We report a simple method for the direct and quantitative determination of L-tryptophan (Trp) and L-tyrosine (Tyr) using a glassy carbon electrode (GCE) modified with single-walled carbon nanohorns (SWCNHs). T...
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Article
A novel method for trace aldehyde determination in foodstuffs based on fluorescence labeling by HPLC with fluorescence detection and mass spectrometric identification
A stable, effective, sensitive and selective method for simultaneous determination of 11 aldehydes in foodstuffs using a novel fluorescence-labeling reagent 2-(12-benzo[b]acridin-5-(12H)-yl)-acetohydrazide (BAAH)...
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Article
Development of an Efficient HPLC Fluorescence Detection Method for Brassinolide by Ultrasonic-Assisted Dispersive Liquid–Liquid Microextraction Coupled with Derivatization
A novel hyphenated technique based on ultrasonic-assisted dispersive liquid–liquid microextraction (UA-DLLME) coupled with derivatization has been established for the determination of brassinolide (BL, a repre...
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Article
A novel aptamer-functionalized MoS2 nanosheet fluorescent biosensor for sensitive detection of prostate specific antigen
Prostate specific antigen (PSA) is a significant and the most widely used biomarker for the early diagnosis of prostate cancer and its subsequent treatment. A MoS2 nanosheet is a two-dimensional (2D) layered nano...
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Article
Simultaneous Determination of Seven Biogenic Amines in Foodstuff Samples Using One-Step Fluorescence Labeling and Dispersive Liquid–Liquid Microextraction Followed by HPLC-FLD and Method Optimization Using Response Surface Methodology
A simple, sensitive and selective method based on one-step fluorescence labeling and ultrasound-assisted dispersive liquid–liquid microextraction (UA-DLLME) was developed for the determination of biogenic amin...
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Article
A Rapid and Sensitive Method for Semicarbazide Screening in Foodstuffs by HPLC with Fluorescence Detection
Semicarbazide (SEM) has been proven to extensively exist in foodstuffs due to anthropogenic factor in food processing and possesses various toxic effects on human health. Although many methods have been develo...
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Article
Electrochemical behavior and voltammetric determination of dihydronicotinamide adenine dinucleotide using a glassy carbon electrode modified with single-walled carbon nanohorns
We report a simple method for the direct and quantitative determination of dihydronicotinamide adenine dinucleotide (NADH) using a single-walled carbon nanohorn (SWCNH) modified glassy carbon electrode (GCE). ...
